Reduced Patient Dose and Improved Image Quality in Computed Tomography Examinations with On-Line Anatomically Adapted Tube Current Modulation
| Autor: | W. Kalender, K. Klingenbeck-Regn, H. Wolf, C. Suess, D. Hentschel, S. Popescu |
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| Rok vydání: | 1998 |
| Předmět: |
Radiation
Materials science Radiological and Ultrasound Technology Image quality business.industry Attenuation Computed tomography dose index Public Health Environmental and Occupational Health General Medicine Noise Modulation Tube current modulation Line (geometry) Image noise Radiology Nuclear Medicine and imaging Nuclear medicine business |
| Zdroj: | Radiation Protection Dosimetry. 80:287-289 |
| ISSN: | 1742-3406 0144-8420 |
| DOI: | 10.1093/oxfordjournals.rpd.a032525 |
| Popis: | A new concept of an on-line anatomically adapted modulation (OAC) of the tube current has been investigated and compared with the pre-programmed sinusoidal modulation (PSC), by measuring Computed Tomography Dose Index (CTDI)-figures and image noise in phantoms. The on-line adapted dose modulation optimally exploits the asymmetry of the object resulting in a considerable dose saving of up to 70% in phantoms and up to 40% in patients. Structured noise in the direction of maximum attenuation is reduced. It turns out that OAC is markedly superior to PSC with respect to dose reduction and improved image quality. |
| Databáze: | OpenAIRE |
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